Concrete pouring method for tubular turbine unit runner of navigation-power junction engineering

Abstract

The invention provides a concrete pouring method for a tubular turbine unit runner of navigation-power junction engineering. The method comprises steps as follows: prefabrication of form baffles; mounting of the form baffles; pouring of concrete at the horizontal section of the runner and dismounting of the form baffles; setting of construction joints of the runner; pouring of foundation concreteof side wall structure sections of the runner; prefabrication of curved forms; mounting of the curved forms; pouring of curved concrete of the runner; dismounting of forms at the lower part of the runner and a secondary plastering process. The contact area of two sections of concrete construction joints is increased through the construction joints formed by the form baffles, the problem that bottom concrete is difficult to pour compactly due to curved steel bars is solved, and concrete can be poured compactly; the problems that curved surfaces and horizontal planes cannot be contacted and vibrated uniformly through conventional pouring due to the fact that the included angle at the junction of the arc section and the horizontal section of the runner is smaller are solved through dismounting of forms at the lower part of the runner and the secondary plastering process, so that the surface flatness, plastering quality and linear control of the runner meet the design requirement.

Description

technical field [0001] The invention relates to the technical field of flow passage construction of a tubular unit of a hydropower station, in particular to a concrete pouring method for the flow passage of a tubular unit of an avionics hub project. Background technique [0002] The flow channel of the power plant of the aviation power hub project is complex and has a large cross-section (R=7.1-16.2m). The concrete shape control and appearance quality requirements are high, and the construction is difficult. The efficiency of the flow channel construction affects the linear construction period of the entire unit for power generation. There are many curved surfaces in the runner concrete, and the concrete construction surface is divided into horizontal sections and circular to square curved surfaces. The appearance quality of the runner concrete is high, and it needs to meet the flow requirements of high flow rate and large flow. Therefore, the surface smoothness, plastering q...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a concrete pouring method for the flow channel of the tubular unit of the aviation power station project, which can effectively solve the problem of difficult quality control of the curved surface of the flow channel, so that the concrete pouring is dense and the flow channel body structure Meet specification and design requirements

Images